The first important exposition in the United States was held in Philadelphia in 1876.
A
暂无解析
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
Someanimalspantandsweattospeedevaporationofbodymoistureandthuscoolthemselves.
Formerly,intheUnitedStates,manynursesworkedasprivatedutynursesratherthaninhospitals.
Bythenineteenthcentury,embroideryonmen'sclothinghadvirtuallydisappearedexceptfortheoccasionaldecorativevestandtie.
DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.